期刊
FISHERIES RESEARCH
卷 121, 期 -, 页码 136-143出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fishres.2012.01.021
关键词
GOV; Survey trawl; Tickler chain; Catchability; IBTS
类别
Comparative trials were carried out to evaluate the performance of the GOV (Grande Ouverture Verticale) survey trawl in relation to a commercial whitefish trawl. The gears were rigged in a twin trawl configuration and a comparison of catch rates suggest that, overall, the differences in performance between the two gears are not great, and vary depending on species and whether the commercial gear is fished with or without a tickler chain. There was no difference in relative catch rate for cod (Gadus morhua) between the commercial gear without a tickler chain and the GOV. However, the commercial gear caught fewer small haddock (Melanogrammus aeglefinus) and whiting (Merlangius merlangus) and more larger ones: fewer lemon sole (Microstomus kitt) and more plaice (Pleuronectes platessa) of all sizes. The addition of a tickler chain to the commercial gear significantly increased the catch rate of cod (particularly smaller ones), lemon sole and plaice; but had no significant effect on haddock or whiting. Smaller number of other species were also caught and a comparison of catch weights suggests that there is no difference for saithe (Pollachius virens) and hake (Merluccius merluccius), while the commercial net was better for megrim (Lepidorhombus whiffiagonis) and monkfish (Lophius piscatorius). Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据